生物质气化微型燃气轮机集成发电系统模拟

Simulation Study of Biomass Gasification and Micro Gas Turbine Integrated Power Generation System

基于Aspen Plus模拟平台,建立了生物质气化与微型燃气轮机集成发电系统,运用该系统对稻壳的气化发电过程进行模拟,研究了气化温度,空气当量比和气化压力对集成发电系统的影响。结果表明:常压气化系统中,气化温度和空气当量比主要通过影响气化产物的热值来影响整个集成发电系统,当量比从0.2增大到0.4时,气体热值降低了43%,系统净效率降低了3.5%。与常压气化系统相比,加压气化系统能使集成发电系统净效率提高10%以上。在加压气化系统中,压比越大,加压气化相比于常压气化系统净效率增长越大,加压气化效果越好,当压比取4.5时,净效率增长最多能达到14%以上,而燃机的温比与加压气化效果呈负相关。

A biomass gasification and micro gas turbine integrated power generation system was developed by Aspen Plus, the gasification power generation process of rice husk was simulated, and the influence of gasification temperature, air equivalent ratio and gasification method on the integrated power generation system was studied. The results show that in the atmospheric gasification system, the gasification temperature and the air equivalent ratio affect the entire integrated power generation system mainly by affecting the calorific value of the gasification product. When the equivalent ratio is increased from 0.2 to 0.4, the calorific value of the gas is reduced by 43%, and the net efficiency of the system is reduced by 3.5%. Compared with the atmospheric pressure gasification system, the pressurized gasification system using the high-temperature dly purification technology can increase the net efficiency of the integrated power generation system by more than 10%. Compared to the atmospheric gasification system, the greater the pressure ratio is in the pressurized gasification system, the greater the net efficiency increase, and the better effect of pressurized gasification. When the pressure ratio is 4.5, the net efficiency can increase to more than 14%. The heat and temperature ratio are negatively related to the effect of pressurized gasification.